TB 9-6625-2139-35
11. Calibrator Amplitude
a. Performance Check
(1) Position controls as listed in (a) through (l) below:
(a) POSITION controls to midrange.
(b) VERTICAL MODE CH 1 BOTH CH 2 switch to CH 1.
(c) VERTICAL MODE TRIGGER SOURCE CH 1 and CH 2 pushbuttons to
COMPOSITE (AN/USM-488).
(d) CH 1 AC GND DC switch to DC.
(e) HORIZONTAL MODE switch to A.
(f) X10 CAL control to in position.
(g) A TRIGGER P-P AUTO pushbutton pressed.
(h) A TRIGGER SLOPE pushbutton to OUT.
(i) A TRIGGER LEVEL control to midrange.
(j) A TRIGGER A TRIG BW switch to FULL (AN/USM-488).
(k) A TRIGGER A&B INT switch to VERT MODE (type 2235).
(l) A TRIGGER A SOURCE switch to INT.
(2) Connect TI CH 1 to TI AMP CAL (PROBE ADJUST on type 2235).
(3) Set TIME/DIV and CH1 VOLTS/DIV switches as listed in table 26. Adjust
CH1 VOLTS/DIV CAL control for 5 divisions of vertical deflection on TI.
(4) Remove connection at TI CALIBRATOR and connect to oscilloscope calibrator
CHAN 1.
(5) Set oscilloscope calibrator VOLTAGE output as listed in table 26.
(6) Adjust A TRIGGER LEVEL and CH 1 and horizontal POSITION controls, as
necessary, to view waveform.
(7) Rotate oscilloscope calibrator knob below EDIT FIELD pushbutton to adjust for
5 divisions of vertical deflection on TI. Oscilloscope calibrator err display will indicate as
specified in table 26, if not perform b below.
Oscilloscope calibrator
Test instrument
Test instrument
VOLTAGE
Err
switch settings
output settings
display limits
VOLTS/DIV
TIME/DIV
Amplitude
(%)
.1
.5 ms
500 mV pp
1 kHz
21
15
% for type 2235.
b. Adjustments
(1) Rotate CH 1 VOLTS/DIV CAL knob fully clockwise to detent.
(2) Connect CH 1 input to oscilloscope calibrator CHAN 1.
